High Temperature GPO-3 Alternatives

[schulkfl]

I am looking for cost effective alternatives to GPO-3. We currently have several units that we make out of GPO-3, however we are reaching temperatures in our unit of ~300°C (GPO-3 is only rated to 130°).
The material must have similar structural and electrical capabilites. Any ideas?

Thanks in advance for any help!
Fred S

 

[alehman]

This will go to 200C:

http://libertypolyglas.com/lamtechdata/GP200HT.pdf

Alan
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"It’s always fun to do the impossible." - Walt Disney

 

[7anoter4]

Try these also:
Mica Sheets[up to 900oC] see:

http://www.made-in-china.com/showro...lsIhp/China-Muscovite-Mica-Plate-PB5761-.html

Glass-Mica Composites MM400 see:

http://crystexcomposites.com/new/documents/MMDataSheetMACHINABLEFINAL_7-07.pdf

 

[ScottyUK]

The switchboards of old were made out of slate. That would probably meet the thermal and structural requirements. There are still a few of these boards in the UK in the older plants. They look like something from a Frankenstein movie.

I'm curious: what are you building?


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If we learn from our mistakes I'm getting a great education!

 

[schulkfl]

Thanks for all the recommnedations- we are building a
Harmonic Filter Resistor-

 

[ScottyUK]

I assume that the conventional technique of a metal structure carrying individual porcelain insulators are unsuitable? That's the way Cressall build their big neutral earthing resistors - is this a similar design?


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If we learn from our mistakes I'm getting a great education!

 

[schulkfl]

Cressal is actually a sister company to us- we are looking at pretty stringent space requirements and so require a little different design. We do however use many similar designs on our other products-

 

[alehman]

See this site for some other choices:

http://www.jacoproducts.com/materials/thermoset.htm

Alan
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"It’s always fun to do the impossible." - Walt Disney